Home / 2,578.11-3,557.79-1,399.19

Finding the Fourth Proportional to 2,578.11, 3,557.79 and 1,399.19

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Solution

The fourth proportional to 2,578.11, 3,557.79 and 1,399.19 is: 1,930.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.11 : 3,557.79 = 1,399.19 : x
  2. Step 2: Convert to fraction form
    2,578.11/3,557.79 = 1,399.19/x
  3. Step 3: Cross multiply
    2,578.11x = 3,557.79 × 1,399.19
  4. Step 4: Simplify right side
    2,578.11x = 4,978,006.40
  5. Step 5: Solve for x
    x = 4,978,006.40/2,578.11
  6. Step 6: Final answer
    x = 1,930.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.